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Echo: perl: security update to 5.40.1-6+e18

critical Tenable Cloud Security Plugin ID 461869

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Perl versions before 5.40.5-RC1, from 5.41.0 before 5.42.3-RC1, from 5.43.0 before 5.43.11 have a heap
 buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds.
 Perl_study_chunk in regcomp_study.c checked the size of the joined substring buffer in characters rather
 than bytes. For a quantified fixed substring with a large minimum count, the byte length mincount * l
 could overflow SSize_t, producing an undersized SvGROW allocation; the subsequent copy writes past the end
 of the buffer. A caller that compiles an attacker-controlled regular expression on a 32-bit perl build
 triggers a heap buffer overflow at compile time. (CVE-2026-8376)

Solution

Update the perl library and its related packages to version 5.40.1-6+e18 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-8376

Plugin Details

Severity: Critical

ID: 461869

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.15

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-8376

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/22/2026

Vulnerability Publication Date: 5/25/2026

Reference Information

CVE: CVE-2026-8376